Change-speed gear.



PATBNTED JAN. 14, 1908. H. DUNHULTER.

CHANGE SPEED GEAR.

APPLICATION FILED APR. 26, 1907.

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HEINRICH DUNIIULTER, OF BERLIN, GERMANY.

CHANGE-SPEED GEAR.

Specification of Letters Patent.

Patented Jan. 14, 1908.

Application filed April 61 1907- Serial No. 370,397.

To all whom it may concern.

Be it knownthat I, HEINRICH DI'iNnoL'rnn, a subject of the King ofPrussia, and resident of 5 N eue Jacobstrasse, Berlin, Kingdom ofPrussia, German Empire, have invented eertain new and usefulImprovements in Chan ge- Speed Gears for Fare-Indicators, of which thefollowing is an exact specification.

This invention relates to change speed gears, more particularly toimprovements in tax-feeding mechanisms for fare indicators. As knownthese feeding mechanisms have the object of connecting the indicatingmechanism with the driving mechanism of the fare indicator in suchmanner that the indicating mechanism is caused to be operated at variousspeeds compared with any constant speed of the vehicle, cab or the like,so that different amounts to be paid are indicated to the customer whenequal lengths of way are described by the vehicle.

In the known construction of feeding mechanisms an arrangement isprovided, according to which several wheels of various sizes,corresponding to the various charges or taxes for the vehicles, arearranged on a shaft belonging to the indicating mechanism, and toothedwheels or the like arranged on another shaft driven on by the back wheelof the vehicle in any convenient manner, mesh with the first mentionedWheels. These wheels can be thrown alternatively into gear with thewheels on the driving shaft, to drive the indicator mech- Aecording tothis arrangements for changing the charge for the vehicle it is requiredto throw into action two wheels and to throw out of action two wheelseach time. For carrying out the change a gap in the teeth must beopposite to a tooth, otherwise there was no possibility of throwing intogear the corresponding toothed wheels and this can be done only afterthe driving shaft is turned further, which revolution must notbeindicated by the indicating mechanism.

According to the present invention the necessity of throwing into gearand disengaging the toothed wheels respectively on the driven and thedriving shaft is avoided and the same number of wheels is arranged onboth the shafts, one wheel being fixedly mounted on the driven shaft andthe other being loosely arranged on the same. Means are provided forcoupling the wheels of the driven shaft with the indicating mechanismproper.

To make my invention clear, reference is had to the accompanyingdrawings, in which by way of example a convenient structure of thefeeding mechanism is illustrated.

Figure l is a side elevation, Fig. 2 a vertical section, and Fig. 3illustrates another position of the feeding mechanism in a verticalsection.

Referring to the ligures: c is a driving shaft, and (Z is the drivenshaft; 0 may be operated in any suitable manner, which does not formpart of the present invention.

(I, and f) are two hearing shields or the like, in which the shafts cand (l are journaled.

In the present constructional form it is supposed that two taxes shallbe indicated by the indicating mechanism, and two toothed wheels 0 and fare fixedly mounted on the driving shaft 0, the wheels being ofdifferent sizes. 7

g and 72. are the two corresponding driven toothed wheels, 1 being-fixedly mounted on the driven shaft (1, whereas the wheel 72 is looselyplaced on this shaft.

71. is a sleeve made integrally with the toothed wheel 71 and connectingthe coupling wheel 7t with the toothed wheel 71.. le is another toothedwheel having the same diameter as the toothed. wheel /.r and being'lixedly carried by the shaft (1.

0 is a disk which in the present case is shaped as a brake(.lisk and isrigidly connected with the wheel Zr".

m is a toothed wheel for the purpose of connecting the shaft d with theindicating" mechanism and m is an annular groove arranged in thecylindrical elongation of the toothed wheel m. \Vith this groove anyconvenient lever or operating device engages (not further shown) for thepurpose of shift-v ing the toothed wheel 'm on the shaft (Z.

m are two arms which extend from the toothed wheel m andare adapted toengage with the wheel 7c", the wheel 7.x" and the brake disk 0. Thewheel m is, as will be seen from the drawing, loosely arranged on theshaft (Z and adapted to be shifted longitudinally on the latter.

According to the foregoing statements the operation of the feedingmechanism will be obvious. The toothed wheels c and g on the one side,and f and 71 on the other side are permanently meshing with each other.For

transmitting the movement of the toothed wheel g to the transmittingwheel m, the arm m must be in engagement with the toothed wheel k (seeFig. 2), what is obtained by shifting longitudinally the wheel m on theshaft d to the lefthand side. According to Fig. 3 the toothed wheel 7Lis driving the wheel m, because the arms m engage with the teeth of thewheel is.

For facilitating the coupling of the arms m with the wheels k W, theclutch disk 0 is provided, the diameter of which is kept thus that thefriction produced by the contact of the arms m with the circumferentialface of the disk 0 causes the wheel m to be rotated. By this way arotation of the latter wheel is maintained, even when the arms m and thewheels 75 and k are disengaged.

It will be observed that three or more pairs of wheels can be providedon the driving and the driven shaft. Again, it is not necessary, toprovide the wheels k k with teeth, any other convenient clutcharrangement can be fitted, for instance the wheels 1c 762 can beprovided with a cylindrical face and a sufficient pressure between thesmooth peripheries of the wheels and the arms can maintain the requiredconnection between the parts. In this case the clutch parts can bearranged side by side and the disk 0 can be dispensed with.

Having thus fully described the nature of this invention, what I desireto secure by Letters Patent of the United States is 1. Thehereindescribed change speed gear for fare indicators comprising: adriving shaft and several driving toothed wheels of different sizes,fixedly mounted on the driving shaft, several driven toothed wheelspermanently engaging with the driving toothed wheels, one driven toothedwheel being fixedly, and the other wheels being loosely mounted on thedriven shaft, a transmitting wheel (m) loosely mounted on the drivenshaft and adapted to be shifted longitudi-' nally, and clutch means forconveying the revolution of the driven toothed wheels for the purpose asdescribed.

2. The hereindescribed change speed gear ewes?" for fare-indicators,comprising: a driven shaft and two driven toothed wheels, one wheelbeing fixedly, the other being loosely mounted on the driven shaft, aclutch part (k) fixedly connected with the driven wheel which is looselymounted on its shaft, a clutch part (762) fixed on the driven shaft andof the same diameter as the first mentioned clutch part, a transmittingtoothed wheel adapted to be shifted longitudinally and having couplingarms adapted to engage with the said clutch parts.

3. The hereindescribed change speed gear for fare-indicators,comprising: a driven shaft and two driven toothed wheels, one wheelbeing fixedly, the other being loosely mounted on the driven shaft, atoothed wheel Us) fixedly connected with the driven wheel which isloosely mounted on its shaft, a toothed wheel (k fixedly arranged on thedriven shaft and of the same diameter as the toothed wheel (7d), atransmitting wheel adapted to be shifted longitudinally and havingcoupling arms adapted to engage with the said toothed wheels (Zc 1c)respectively.

4. The hereindescribed change speed gear for fare-indicators,comprising: a driven shaft and two driven toothed wheels, one wheelbeing fixedly, the other being loosely mounted on the driven shaft, atoothed wheel (76 fixedly connected with the driven wheel, which isloosely mounted on its shaft, a toothed wheel (k fixedly arranged on thedriven shaft and of the same diameter as the toothed wheel (k), aclutch-disk rigidly connected with the toothed wheel (K6 and of the samediameter, a transmitting wheel loosely mounted. on the driven shaft andhaving coupling arms adapted to engage with the toothed wheels (70 k andthe said clutch disk.

In witness whereof I have hereunto set my hand in the presence of twowitnesses.

HEINRICH DUNHOLTER.

W'itnesses l VOLDEMAR HAUPT, HENRY HAsPER.

